Determination of the area per unit mass of powders (specific surface) by means of gas adsorption. B.E.T. method:volumetric measurement of the adsorption of nitrogen at low temperatures.

View the extract New: UPSELL service

Main informations

Collections

National standards and national normative documents

Publication date

November 1975

Number of pages

20 p.

Reference

NF X11-621

ICS Codes

19.120 Particle size analysis. Sieving

Classification index

X11-621

Print number

1 - décembre 1983

ZOOM ON ... the Requirements department

To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!

New: UPSELL service

- The UPSELL service allows you to easily update one of your standards.
- With a single click, add a new language, the Requirements or Redline+ service and add one or more additional users.
- Whether you are in the process of acquiring a standard or it is already available in your personal space, the UPSELL service is available at every stage to help you understand it and implement it within your organization.

Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ